(1, 1.0, 2.0),
(1,0,1),
('','',''),
('hi ','wuya','hi wuya'),
(0, '', "unsupported...operand type(s) for +: 'int' and 'str'"),
(1,'hi',"unsupported operand type(s) for +: 'int' and...'str'"),
(1.0,'wuya',"unsupported operand type(s) for +: 'float' and 'str'"),
])
def test_add